Slide for extension-screens.



No. 804,152. PATENTED NOV. 7, 1905. A. H. MIX.

SLIDE EUR EXTENSION SCREENS.

APPLICATION FILED EEB. 24, 1905.

2 SHEETS-SHEET l @Vw F' .f @ya l W Y l I 1"' .X

W1- 6 INVE/vok PATENTED NOV. '7, 1905.

, A. E. MIX. SLIDE EOE EXTENSION SCREENS.

APPLICATION FILED FEB. 24, 1905.

2 SHEETS-SHEET 2.

, UNITED STATES PATENT oEEIoE.

SLIDE FOR EXTENSION-SCREENS..

Specification of Letters Patent.

Patented Nov. 7, 1905.

Application filed February 24:, 1905. Serial No. 247,182.

To al?, whom it may concer-n:

Be it known that I, ALLEN H. Mix, of Burlington, in the State ofVermont, have invented a new and useful Improvement in Slides forExtensible Screens, Tables, and other Articles, of which the followingis a specification.

-said grooves, each roller being restrained from material longitudinalmovement in one of the sections while free to move lengthwise of theother in the groove therein.

Under my improvement the roller engages and is held in place by the clior retainer with which it cooperates and is oose, so that it may beinserted in and removed from the retainer at will. The retainer projectsfrom the inner face of the section to which it is held at an inclinationto the face of that section and enters a correspondingly-inclinedlongitudinal groove in the contiguous face of the opposite section, inwhich groove it can slide. The `loose roller when once in place locksthe retainer in the section which it slidably engages--that is to say,it prevents the retainer from being withdrawn from that roove while notinterfering with, but rather facilitating, its longitudinal movementtherein.

In the accompanying drawings, to which I shall now refer for a betterunderstanding of my improvement, Figure 1 is a perspective view of theretainer and roller in one form in which they may be conveniently used.Fig. 2 is a like view, divested, as far as possible, of details, of twosections connected together by the retainer and roller, one of thesections being broken away, so as to expose the connecting devices. Fig.3 is a cross-section on line 3 3, Fig. 2, with the roller in edge elevajtion. Fig. 4 is a view of a modified form of retainer. Fig. 5 is aperspective view of two sections connected together by this form ofretainer, vportions of the sections being broken away. Fig. 6 is across-section on line 6 6, Fig. 5. Fig. 7 is a view representing theapplication of the device of Figs. l to 3 to an extension-screen.

In Figs. 1 to 3 the retainer M is of sheet metal and of V form'incross-section, the apex of the V being slightly pinched, so as to form arib in which is cut a nick or slot a lengthwise of the retainer a littlelonger than the diameter of the roller N, (in this instance a fiatcircular metallic disk) which looselyts in the slot a.

X and Y are typical of the two overlapping sections to be connected. 'Inthe meeting faces of the sections are formed two longitudinal grooves o;y, the former inclined to take one leg of the retainer M and the latterhorizontal to take its half of the roller B. When the two sections arefitted together, the two grooves a: form a single contiguous groove of Vcross-section and the two grooves y register to form a single groovewhich lies in both sections.`

The leg of the retainer is held against material lengthwise movement inthe inclined groove :t of one section-section X in the presentinstance-for which purpose it may be held between two stops c, one ateach end of it, in the groove a; of that section. In this position itcan be lifted out of its groove x; but when the roller N is dropped intoplace in its slot c in the retainer, in which position it will enter andengage the horizontal groove y in section X, it will be seen that itlocks the retainer against withdrawal from'the section X, while at thesame time it itself is locked against material longitudinal movement inthe slot y by the retainer. Whenv the opposite section Y is slid ontothe leg of the retainer M and the portion of the horizontal roller N,which projects from the face of section X,'it will be seen that the twosections are locked closely and securely together, while at the sametime, if desired, the one section may slide lengthwise on the other.

In the modification shown in Figs. 4 to 6 the two grooves x y in eachsection X and Y are non-communicating and are separated from each otherby a solid portion of the body of the section, and the retainer shown atM consists' of a vertical plate from one of the longitudinal edges ofwhich extend oppositely-inclined members or legs a', which are designedto engage the grooves x in the meetinflr faces of the sections, while inthe vertical member a2 of the retainer is a horizontal slot a3 ofsuitable dimensions to receive the roller N, which projects from eachside of the plate into the registering horizontal slots y of the twosections. In this modification thevertical member of the retainer isinterposed between the meeting faces of the sections. The stops c c inthis modifica- IIO tion serve the same purpose as the like-designatedstops in Fig. 2.

The application of the device to the sliding sections of an eXtensiblescreen will be readily understood by reference to Fig. 7. Thelongitudinal grooves and y are formed in the meetin faces of theoverlapping top and bottom rais of the two screen-sections, and in theinner end of each rail is secured the device consisting of the retainerand roller, which engage and arefree to move in the inclined andhorizontal grooves of the opposite rail, as hereinbefore described withreference to the sections X Y, Figs. 1 to 3.

The rollers N may be of disk form, as shown, or of other suitable form,and I desire to be understood as including any such modification in myclaims.

Having described my' improvement and the manner in which the same is ormay be carried into effect, I state in conclusion that I do not limitmyself to the structural details hereinbefore set forth and representedin illustration of the improvement, since manifestly the same can bevaried considerably without departure from the spirit of the invention;but

What I claim, and desire to secure by Letters Patent, is as follows:

l. The combination of two overlapping rails, having registeringinclined, and horizontal grooves formed in their opposed meetingfaces,a-retainer provided with limbs engaging the inclined grooves, and heldagainst longitudinal movement inone of the rails, and a roller looselyengaging the retainer and projecting from opposite sides thereof intothe registering horizontal grooves in the rails, substantially as andfor the purposes hereinbefore set forth.

2. In an extension-screen, two screen-sections having in the meetingfaces of'their overlapping rails longitudinal registering inclinedgrooves :1c and horizontal grooves y, a retainer of substantially V formin cross-section which is secured to the inner'end of each rail againstlengthwise movement therein and engages the inclined grooves in themeeting faces of the opposed rails, and a roller which loosely engagesand is held by the retainer and projects therefrom into the registeringhorizontal grooves of said rails-the combination being and actingsubstantially as hereinbefore set forth.

8. The two overlapping sections having registering inclined andhorizontal grooves x, y in their meeting faces, in combination with aretainer of V cross-section, engaging the inclined grooves and heldagainst lengthwise movement in one of the sections, and a roller looselyseated in a slot in the head of the retainer and projecting fromopposite sides thereof into the horizontal grooves y, substantially asand for the purposes hereinbefore set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ALLEN H. MIX.

